Purpose

The purpose of this paper is to study the influence of temperature on the acceleration and simulation of indoor corrosion tests and the corrosion behavior of Q235 carbon steel.

Design/methodology/approach

The indoor corrosion test was carried out by continuous salt spray in a salt spray chamber. Weight loss analysis, X-ray diffraction, cannon 1500 D, scanning electron microscopy and electrochemical techniques are used to analyze the results.

Findings

It was found that thickness loss of Q235 carbon steel increases with higher temperature and it can reach 0.095 mm at 50°C. Compared with the Xisha exposure test, the acceleration rate can achieve 230 times. This phenomenon indicates that decreasing the experimental temperature is beneficial to the anti-corrosion of the Q235 carbon steel. It is fascinating to find that acceleration and simulation increase with temperature simultaneously, which shows that β-FeOOH promotes the corrosion rate and α-FeOOH provides high simulation. Meanwhile, electrochemical impedance spectroscopy indicates that the resistance of the rust layer improves with temperature.

Practical implications

Through the study, the authors found that with the increase of temperature, the acceleration and simulation of indoor corrosion test improved, corrosion products and kinetics are the same as those in outdoor exposure test, and which means that the laboratory can achieve the long-term corrosion degree of outdoor exposure in a short time, and the similarity with outdoor exposure is high. This helps to the study of marine atmospheric corrosion, and indoor accelerated corrosion tests can largely eliminate regional differences by adjusting some environmental factors, and lay a foundation for marine atmospheric corrosion.

Originality/value

The effects of temperature on the acceleration and simulation of indoor corrosion tests are discussed. Through laboratory experiments, the long-term service life of Q235 carbon in the Xisha marine atmosphere can be predicted effectively.

中文翻译：

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温度对Q235碳钢室内腐蚀试验加速度的影响及模拟

目的

本文的目的是研究温度对室内腐蚀试验加速和模拟以及Q235碳钢腐蚀行为的影响。

设计/方法/方法

室内腐蚀试验在盐雾室中通过连续盐雾进行。失重分析、X 射线衍射、Cannon 1500 D、扫描电子显微镜和电化学技术用于分析结果。

发现

发现 Q235 碳钢的厚度损失随温度升高而增加，在 50°C 时可达 0.095 mm。与西沙曝晒测试相比，加速度可达230倍。这一现象说明降低实验温度有利于Q235碳钢的防腐。有趣的是，加速度和模拟同时随着温度的增加而增加，这表明β -FeOOH 促进了腐蚀速率，而α -FeOOH 提供了高模拟。同时，电化学阻抗谱表明锈层的电阻随温度的升高而提高。

实际影响

作者通过研究发现，随着温度的升高，室内腐蚀试验的加速性和模拟性提高，腐蚀产物和动力学与室外暴露试验相同，这意味着实验室可以实现长期短时间暴露在室外的腐蚀程度，与室外暴露的相似度高。这有助于海洋大气腐蚀的研究，室内加速腐蚀试验可以通过调整一些环境因素，在很大程度上消除区域差异，为海洋大气腐蚀奠定基础。

原创性/价值

讨论了温度对室内腐蚀试验加速和模拟的影响。通过室内实验，可以有效预测Q235碳在西沙海洋大气中的长期使用寿命。